stack trace php

pretty_stack_trace.php

function stackTrace() {
    $stack = debug_backtrace();
    $output = '';

    $stackLen = count($stack);
    for ($i = 1; $i < $stackLen; $i++) {
        $entry = $stack[$i];

        $func = $entry['function'] . '(';
        $argsLen = count($entry['args']);
        for ($j = 0; $j < $argsLen; $j++) {
            $my_entry = $entry['args'][$j];
            if (is_string($my_entry)) {
                $func .= $my_entry;
            }
            if ($j < $argsLen - 1) $func .= ', ';
        }
        $func .= ')';

        $entry_file = 'NO_FILE';
        if (array_key_exists('file', $entry)) {
            $entry_file = $entry['file'];               
        }
        $entry_line = 'NO_LINE';
        if (array_key_exists('line', $entry)) {
            $entry_line = $entry['line'];
        }           
        $output .= $entry_file . ':' . $entry_line . ' - ' . $func . PHP_EOL;
    }
    return $output;
}